Dip-pipe valve



(No Model.)

W. ANDERSON.

DIP PIPE VALVE.

No. 462,462. Patented Nov. 3, 1891.

NrTED STATES PATENT OFFICE.

lVILliIAM ANDERSON, OF l\[ARLBOROUGII, MASSACHUSETTS.

DIP-PIPE VALVE.

SPECIFICATION forming part of Letters Patent N 0. 462,462, datedNovember 3, 1891;

Application filed March 30, 1891. Serial No, 386,953. (No model.)

To aZZ whom it may concern:

Be it known that I, WILLIAM ANDERSON, a citizen of the United States,residing at Mail borough, in the county of Middlesex an d State ofMassachusetts, have invented a new and useful Improvement in Dip-PipeValves, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thespecification, in explaining its nature.

In the manufacture of illuminating-gas the retorts are connected with amain or conduit, through which the gas passes to the purifying apparatusby means of a pipe, and this pipe has a valve which is known as adipvalve, in that it is dropped or let into water which is contained inthe said main or conduit when it is desired to close the connectionbetween the retort and the conduit, and is lifted from said water whenit is desired to establish aconnection between the retort and the main.This connection is required to permit the gas to escape from the retortwhile the charge is being worked; but when the retort is open it isessential that a backflow of gas from the main or conduit be prevented.

My invention relates to a dip-valve of simple construction and havingvalve-seats easily shaped or provided and not liable to be choked bycoal-tar or other gas products sufficiently to interfere with itsperfect operation.

In the drawings, Figure 1 is a view in perspective of the plunger. Fig.2 is a view in elevation, and Fig. 3 is a view in vertical section ofsufficient of the apparatus to illustrate my invention. 7

A is a pipe connected at its lower end with the retort and having at itsupper end an upwardly-inclined branch pipe a, which connects the pipe Awith the vertical pipe B. There is attached to the lower end of thevertical pipe B the valve-casing C, the pipe having a flange b and thevalve-casing a flange c and the two flanges being secured by bolts andnuts. A section 0 of the valve-casing extends into the cavity 0 of theconduit or main D, and the valve-casing has a flange 0 which extendsupon and is bolted to the cylindrical neck 61 about the opening d to theconduit D. This valve-casin g has two boresnamely, the bore 0, which isthe larger and upper, and the bore 0 Between the bores there is aninclined valve-seat c. In the lower end of the valve-casing there is ahole 0 of somewhat less size than the bore The bore 0 the valve-seat c,and the hole 0 are made of a size to receive the dip-valve or plunger E.This valve has the upper sectione of a diameter to quite snugly fit thebore a, the lower section 6 of a diameter to fit the hole 0 but smallerthan the bore 0 and the inclined intermediate section or seat 620E aninclination or shape to correspond with that of the valveseat 0. Thevalve is hollow or open from one end to the other. Vertical movement isimparted to it by means of the rod a which is connected at its lower endwith the valve by a bail, the lever 6 pivoted at e to a standard e andthe rod 0 In theconduit or main D there is-always the water f, verynearly half filling it, and the valve E is of such length that whenseated its lower end projects considerably below the lower end of thevalve-casing and into the water. When the valve is so located, thecommunication between the upper portion of the conduit or main, throughwhich the gas ordinarily travels from the retort, is shut off by a waterseal, the opening in the valve E then being below the upper surface ofthe water in the conduit. To establish such a connection between theretort and the conduit or main as will permit of the regular flow of gastherefrom, the rod 6 is drawn downward and the valve or plunger E lifteduntil its lower edge is above the level of the water in the conduit andsubstantially flush with the lower edge of the valve-casing. The loweredge I) of the vertical pipe B acts as a stop in preventing the plungerE from being moved upward more than the desired distance.

It will be seen that a valve-casing and valve constructed as hereinindicated has three seatsnamely, the upper sliding seat, being thesection 6 of the valve and'the upper portion of the valve-casing; thelower sliding seat, being the section a of the valve and the portion ofthe valve-casing about the hole 0 and the fixed seat, being the inclinedsection e of the plunger and the inclined seat 0 of the valve-casing.This insures two things.

First, it prevents the escape of gas from the conduit through the pipeBto the retort when the valve is closed, it being practically impossiblefor gas to pass from the conduit past the three seats into the pipe B;second, it provides for the efticient Working of the valve in thepresence of coal-tar and other coal-gas products, in that the presenceof such substances upon or about the valve-seats will not prevent theproper working of the valve.

While I have shown the valve-casing and valve as having three seats, yetone of the seats may be dispensed with and very fair results be reached,I should prefer. in such case to dispense with the valve-casing, seatand the valve-seat e It will be seen that the sections 0 c of thevalve-casing not only act as valve-seats, but also to center and guidethe plunger or guide E in its movements.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States 1. A dip-pipe valve comprising avalve-casing 0, provided with bores 0 0 the bore 0 being the upperandlarger, the narrow valve-seat 0 between the two bores, and the narrowbearing 0 at the lower end of the said casing of less diameter than thatof the bore section c the hollow plunger 0r valve E, having the uppercylindrical valve section 6 to fit the bore cfithe valve-seat e to coactwith the stationary valve-seat 0 the lower cylindrical cavity, the saidvalve-casing having above the conduit the relatively large bore 0 andthe valve-seat 0 and below the valve-seat and within the conduit-cavitythe smaller bore 0 and at its lower end the bearings of a diameter lessthan the bore 0 the verticallymovable hollow plunger or valve E, havingthe enlarged cylindrical upper section 6 to fit the bore 0 forming aslide-valve therewith, the valveseat c and the relatively longcylindrical lower section 6 of the size of the bearing 0 and forming aslide-valve therewith and extending from the same and mov able into andfrom the water in the conduit, as and for the purposes described.

l/VILLIAM ANDERSON.

Witnesses:

F. F. RAYMOND, 2d. J. M. DOLAN.

